文档介绍：机械设计带轮大作业设计题目设计驱动离心鼓风机的V带传动机械院(系)····························································································································································································································································································································································································································································································································································································································································································································································································································································································································································································································································································································7设计计算及说明结果一、,从动轮2装在鼓风机轴上,两带轮中心的水平距离a等于大带轮直径的2倍。:Y112M-4鼓风机转速n2(r/min):1440一天工作时间(h):(1)绘制小带轮装配图一张(2)(1)V带传动的设计带的型号、根数、长度,带轮尺寸,带传动中心距,作用下周上的压力(2)V带轮的结构设计带轮的材料、结构型式,计算基本结构尺寸等。二、V带传动的设计由已知的电动机型号Y112M-4,查参,可得电动机的额定功率P=4kw,满载转速=1440r/min,传动装置应有的传动比i=,-6(p230)查得工作情况系数KA=,=1440r/minP=4kw=1440r/mini= 根据Pc和小带轮转速由图9-11(P229)选用A型。(1)初选小带轮的基准直径dd1,由P230的表9-7,可取小带轮的基准直径dd1=150mm。=i×dd1=288mm再由表9-7基准直径系列选=280mm。取=,则实际传动比i==,%。(2)验算带速v因为5m/s<v<25m/s,故带速合适。×()2×()。=550.===150v=-2选带的基准长度L